Have some patience man. Did you expect them to do vkyc at 2 in the morning?
After you fill up the institute wise link you have posted, You would get a call from assisted cc agent, who will will fill up the details for you.
After that you would get a mail & msg to upload document and do vkyc.
If you haven't received it Google icici assisted vkyc. It will ask otp from mobile. After log in check that it shows icici sapphiro dual cc. If it shows just icici cc then that guy have messed up and you should mail them again to send proper link.
You don't have to upload anything other than degree. And you would need pan for vkyc.
Select as solution if solves your query.